Convenient Synthesis of Fluoroalkyl-Substituted Heterocycles from 1-Fluoroalkyl-2-iodoalkenes
作者:Hui-Ping Guan、Xiao-Qing Tang、Bing-Hao Luo、Chang-Ming Hu
DOI:10.1055/s-1997-1376
日期:1997.12
A convenient synthesis of fluoroalkyl-substituted heterocycles including 3-trifluoromethylpyrazoles 7, 5-trifluoromethylisoxazoles 8 and 4-trifluoromethylpyrimidines 9 is described. This two-step sequence consists of a radical addition of fluoroalkyl iodides 1 to alkynes 2 to afford the corresponding alkenes 3 and condensation of 3 with hydrazine, hydroxylamine or amidines to give the afore-mentioned heterocycles, respectively. A possible pathway is suggested.